The department instead recommended that the National Bureau of Investigation and the Philippine National Police investigate further the "possible" role of Dingalan Mayor Jaime Ylarde in the death of Philip Agustin but would pursue the case against three others, Senior State Prosecutor Emmanuel Velasco said in the three-page document.

"There is not enough evidence to establish whether or not Mayor Ylarde is involved in the killing of Agustin," Velasco said.